Getting started with GroundControl Caster

Updated: Jun 30

GroundControl Caster offers audio processing together with audio routing - so that you can create the perfect audio stream sound. combine audio from any input devices, microphones, individual application sources, mix them, and stream.

Download GroundControl Caster.

Download the pkg file from

It is highly recommended to close your DAW and any audio applications before running the installer.

Run the installer

Once finished you will have:

  • GroundControl Caster virtual audio driver installed together with “GroundControl A” and “GroundControl B” drivers.

  • GroundControl Caster application under your Applications folder. For ease of access, you can use the GroundControl CasterTray bar Icon – located in your top tray bar.

Once you run the GroundControl Caster app for the first time it will ask permission to access your microphone – please make sure to allow this.

If the system hasn’t asked for this permission, go to your settings > Security>Microphone

Routing audio

Once you run the GroundControl Caster application, it will automatically set your system sound output to use the GroundControl Caster driver. This is mandatory for routing applications audio into GroundControl Caster.

The application will automatically set :

Output A > to GroundControl A driver

Output B > to GroundControl B driver

Monitor output selection will be set to the device that was previously selected in your system sound output.

Routing audio to/ from DAW and apps.

Application setups

For most applications, you don’t need to select the audio output destination. For these applications, no action is needed in order to receive audio from them.

Some applications such as Zoom, Discord, or Twitch require setting up the input &output in the application settings.

To route audio from these apps into GroundControl Caster -

Set the output (commonly named “Microphone”) to GroundControl Caster driver.

GroundControl Room Application

GroundControl Caster Application

GroundControl Caster has 11 input channels.

Channels 1-8 intended for virtual inputs such as desktop audio, Zoom, Twitch, Whatsapp, etc.

Channels 9-11 intended for physical inputs such as a microphone, instrument, audio interface, etc.

Input Channels 1-8 (Applications)

Select an application as input (Desktop audio, Zoom, Whatsapp, any DAW etc.)

Opening the selections menu will show all the currently running applications on your system.

Every input has its own meter, level knob, and three plugin inserts. To insert a plugin just click on the arrow button and choose a plugin. you can bypass the plugin or replace it anytime.

Plugins in this section are chained from top to bottom.

There are 2 output options - Output A and Output B. You can send it either to Output A, Output B, or both.

Input Channels 9-11 (Physical inputs)

Select a physical input (Microphone, instrument, interface, etc.)

Channels 9-11 have the same features as channels 1-8: three chained plugin inserts, streaming to output A/B, volume control, and input meter.

Output section

GroundControl Room features 2 mixes sends, so you can stream your audio to 2 different destinations.

Just click on the output destination selection and set up your outputs. You can choose either a Virtual driver\ Audio interface.

You can insert plugins on each output - this is great for adding room correction, Eq, or limiter plugins on the output. you can also insert a streaming plugin to stream your mix directly out from GroundControl.

This plugin will affect all the audio that is routed from Output A/B.

The output section has output gain knobs for each output, output meter, and mute buttons.

You can select how to monitor the audio. Select which output you want to monitor - A/B. Monitoring A/B, you will hear the audio that comes out from the selected output- post-fader, plugin & mute. This will allow you to listen to the exact audio you are streaming.

To set your monitoring device, select it in this field:

Let’s have a look at the menu options:

Rescale: You can rescale the application by choosing the scaling percentage. this will let you scale the app’s visual interface for your resolution needs.

You can also rescale by holding the bottom right corner of the app and dragging it in and out.

Buffer size selection

You can adjust your buffer size from Very low latency to CPU efficiency.


Launch on system startup - will launch the application on each system restart.

Always on top - similar to the pin button (in the top right corner), will keep the application window on top of all other applications.

Show Audio Engine Overload message - This will pop up a warning message if your system CPU is overloaded. When this message appears, it is recommended either to increase the application buffer size or remove some plugins.

One plug-in editor window at a time - You can choose to see only one plugin window at a time or multiple windows.

Enable keyboard input monitoring - This option will pop up an OS permission request to grant access to input monitoring. For this to take effect, the OS requests to restart the application. Once done, all key commands will work all the time, regardless if the application is in front or not. This option allows you to control the app, anytime even while working on your DAW, using key commands.

For questions and inquiries, write me at or join my Discord channel.

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